Low-grade Anshan magnetite beneficiation process

Abstract

The invention relates to a low-grade Anshan magnetite beneficiation process. The low-grade Anshan magnetite beneficiation process is characterized by comprising the following steps: ores with a grade of 18.34% are fed in a rough crusher and a wet semi-autogenous mill in sequence; oversize products on a cylinder screen and a linear vibration screen are merged and returned to the wet semi-autogenous mill; undersize products on the linear vibration screen with a particle size of below 3 mm are fed in a weak magnetic separator to separate weak magnetic separator concentrates from weak magnetic separator tailing; rough concentrates of the weak magnetic separator are fed in a next sorting procedure; the weak magnetic separator tailing is fed in a primary concentration cyclone and a high-frequency dehydration screen; overflows of the primary concentration cyclone and undersize products of the high-frequency dehydration screen are combined as fine-particle tailing to feed into a tailing conveying system; and the coarse-grain tailing with a water content of 15-20%, a grade of 6.85% and a particle size of 3-0.3 mm and dehydrated by the high-frequency dehydration screen is used as building sand. The low-grade Anshan magnetite beneficiation process has the following advantages: the same one process can extract both coarse concentrates and the building sand.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and in particular relates to a low-grade Anshan-type magnetite ore beneficiation process. Background technique [0002] Anshan-type iron ore has carried out scientific research such as silicate chemical analysis, particle size composition analysis, mineral composition analysis, sintering experiment, and radioactive inspection. , low sulfur phosphorus type, fine particle size, simple mineral composition, no radioactive pollution and other properties, can be developed into a variety of building materials products, which is a unique advantage that other mines do not have. [0003] Anshan-type iron ore is an economical and practical composite mineral raw material. Its useful mineral iron ore can be used as a raw material for metallurgy, and gangue mineral silicon can be used as a raw material for building materials. [0004] Now using Anshan-type iron tailings can develop new building material ...

AI Technical Summary

Problems solved by technology

[0008] 1. Since this process is to extract river sand from tailings, the amount of tailings suitable for building river sand in the tailings treated by the process is too small, and only a small part of qualified products can be extracted

[0009] 2. The tailings reprocessing system needs to be added separately, which increases the investment of the enterprise, and the investment recovery period of the enterprise is long and the efficiency increase is slow;

[0010] 3. After the coarse tailings are extracted from the process, the original balance of tailings treatment is destroyed, and the tailings treatment system of the original process needs to be rebuilt, which also increases the investment of enterprises

Images